Amory felton



A. FELTON.

Grinding Mill,-

; Patented Jan. 2, 1855.

I No. 12,181.

s Phnin-Lilhographun Wauhinglulm D. cv

amen STATES PATENT ornron AMORY FELTON, or TROY, NEwxoRK.

GRINDING-MILL.

Specification formingpart of Letters Patent No. 12,181, dated January 2,1855; Reissued January 29, 1856, No. 347. v

. declare that the following is a full, clear,

and exact description of the same, reference; being had to the annexeddrawings, making a part of this specification, in which- Figure 1 is alongitudinal vertical section of my improved mill, the cylinder notbeing bisected. The plane of section is through the center. Fig. 2 is atransverse vertical section of ditto, the hopper andtshoe not beingbisected. Fig. 3 is a detached plan or top view of the concave. Fig. 4is an internal view of the cap which covers the cylinder, said cap beinginverted.

' Similar letters of reference indicate corresponding parts in theseveral figures.

The nature of my'invention consists in the employment or use of acorrugated cylinder, concave and cap provided with spiral flanches, andreciprocating teeth. The above parts being combined and arranged as willbe presently shown.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

A, Figs. 1 and 2, represents a box or case uponthe upper part of whichthe axis (a) of a cylinder B has its bearings. A portion of thecylinder, about one half, being within the box or case. The periphery ofthe cylinder B is corrugated or has teeth upon it, one side of which,are radial with the cylinder, the opposite side, being oblique orinclined but not quite tangential with the periphery of the cylinder asshown in Fig. 2. The cylinder is made of cast iron, chilled cast iron ofcourse being preferable, or it can be made of stone, or stone and ironcombined, or of any other material. Directly underneath the cylinder Bthere is a concave C which is semicircular, see Fig. 2, and constructedof the same material as the cylinder. The concave is provided with teethon about two thirds of its surface, the teeth of the concave beingprecisely similar to the teeth of the cylinder. The ends of the concaverests in semi-circular grooves or recesses at the inner sides of the boxor case and directly underneath the concave there is a frame D the endsof which fit in the inner sides of the box or case. To the outer edge ofthis frame an; upright E is attached hav ing a screw thread cut on itsupper endon which anut Fis fitted. The upper'end of.

the screw thread passes through the center of a spring G, the nut Fbeing on the upper:

side of'the spring as shown in Fig. 2.

H is a cap which isfitted over the top of.

thecylinder B, one side of the cap is curved and corresponds to aportion of the periphcry of the cylinder, see'Fig. 2. At one end of thecap there is an opening (6). The un-' der surface of the cap is providedwith spiral fianches (0) see' Figs and the portion of the concave Cwhich is not'provided with teeth is-also, provided with spiral fianches(a) see Fig. 3 which when the cap is placed over the cylinder coincidewith the flanches of the cap, see red dotted lines Fig. 1.

I is a rod which passes longitudinally through the cap H at one side,see Figs. 1, 2, and 4. One end of this rod is bent and fits in anirregular groove (d) out in the periphery of pulley J which is hung atone end of the axis (a) of the cylinder B.- The opposite end of the rodI is bent upward and passes through a slotted plate K attached to theend of a shoe L which is underneath a hopper M, said hopper being supported by a frame N on the upper part of the box or case A, see Figs. 1and 2.

To the rod I are attached a series of teeth or fingers (e) see Figs 1and 2 and 4: the teeth or fingers being shown by dotted lines in Fig. 1.The teeth or fingers (6) project downward to a point about on a linewith the center of the cylinder, as shown in Figs. 1 and 2.

At one end of the concave C there is an opening (f), see Figs. 1, 2 and3, the opening being shown by dotted lines in Fig. 1.

The grain to be ground is placed in the hopper M and the clyinder Bbeing made to rotate the grain passes from the shoe L and through theopening (6) and then between the cylinder and concave, the shake motionbeing given the shoe by the reciprocating motion of the rod I thereciprocation motion being given the rod by the irregular groove (0!) inthe pulley J. The concave C it will be seen extends around about onethird only of the periphery of the cylinder, and the grain is admittedbetween the cylinder and concave at one end. The grain as it is crushedis carried along to the opposite or discharge end of the concave by thespiral flanches (c). The flanches being so arranged as to cause thegrain to pass over the cylinder and between the grinding surfacesseveral times before reaching the discharge end, and in such manner asto render it impossible for the grain to pass twice between any portionof the grinding surfaces, thus leaving the passage clear for that whichfollows, by which means the mill can be fed very fast without cloggingand the cylinder and concave are made of sufficient length so that thegrain may be passed through a suflicient grinding surface. The fingers(e) vibrate or work with a reciprocating motion at the discharge end ofthe concave opposite the opening (f) and prevent the ground grain fromclogging at that part. The concave is adjusted to the cylinder so as togrind coarse or fine by operating the nut F on the upper part of the rodE.

Although the term cylinder is used in the description of the mill, stillit may be of slighttaper form and also the concave. The cylinder andconcave very slightly increasing in diameter toward the discharge end.This would give a greater grinding surface with a given length than if aperfect cylinder were used.

The above mill works well in practice and requires but very little powerto drive it, 'inE30 consequence of the arrangement of the concave andflanches. One horse power will grind four bushels per hour. It isintended for farmers use,'and principally for grinding feed, but worksequally well for grinding cofi'ee, spices, drugs, &c., and when made ofstone, works well for grinding flour.

I do not claim separately either of the parts herein described, but

What I do claim as new and desire to secure by Letters Patent, is

The combination of the cylinder B, concave C, cap H, and reciprocatingteeth or fingers (e) the concave and cap being provided with spiralflanches (0) the above parts being constructed and arrangedsubstantially as shown and for the purpose as set forth. J

AMORY FELTON.

Witnesses:

P. L. J ONES, Moses WARREN.

[Fmsr PRINTED .191 3.]

